PlotXY manual X Axis Scaling doesn't rescale Y-Axis auto-scaling

Question

I'm using PlotXY(..) to display data on a graph.
I use SetAxisScalingMode(...) to set set VAL_LEFT_YAXIS to VAL_AUTOSCALE.  
I use SetAxisScalingMode(...) to set set VAL_TOP_XAXIS scaling to VAL_MANUAL.
I make various calls to SetAxisScalingMode(...) which change the min & max values for the X-Axis.
Everything thing seems to display correctly except that changing min & max values using manual scaling on the x-axis does not seem to change the range of data used to auto-scale the y-axis.
For example say you have a peak in your data that you want to exclude so the auto-scaling on the y-axis will zoom in.
So you change the max, min manual x-axis scaling to leave out the peak but scaling but the y-axis scaling doesn't change.
Is this the way it should work?
Ideas for a work around?
Thanks,
Kirk

Answer 1

Hi Kirk,
As you've noticed, the autoscaling of an axis in the graph is based on the entire data of each plot, not just on the portion of the plot that is within the range of the other axis.
If you use only integer limits for the min and max of the x axis, if you plot only 1D arrays, and if you don't mind re-plotting every time that you want to manually change the x-axis, there's a possible workaround, consisting of replacing PlotY with PlotWaveform, so that you can offset the data to plot.
I've adapted the code that you attached earlier to illustrate this:
int xmin = 40;
int xmax = 90;
SetAxisScalingMode(handle, PANEL_GRAPH, VAL_BOTTOM_XAXIS, VAL_MANUAL, (double)xmin, (double)xmax);
PlotWaveform (handle, PANEL_GRAPH, datapoints + xmin, xmax - xmin, VAL_DOUBLE, 1.0, 0.0, xmin, 1.0,
              style, VAL_EMPTY_SQUARE, VAL_SOLID, 1, color);